请求协助：XML数据无法正常传递至REST API问题

Hey there! Let's get to the bottom of why your XML request is returning an empty array when JSON works perfectly. Here are the key checks and fixes to try:

• Confirm the Content-Type header is set correctly
  REST APIs rely heavily on this header to know how to parse the request body. For XML, you need to set it to either application/xml or text/xml in Postman's "Headers" tab. If you leave it as the default (or set to application/json by mistake), your API won't recognize the XML data and will return an empty result.

• Make sure your XML structure matches the API's expected schema
  XML is more strict about hierarchy and tag names than JSON. Double-check that:

  • Root nodes, nested tags, and field names exactly match what the API expects (case sensitivity matters here!)
  • Array structures are properly represented (e.g., if your JSON uses an items array, your XML might need <items> wrapping multiple <item> tags)
    Compare your XML side-by-side with the working JSON payload to ensure every field maps correctly. For example, if your working JSON is:

  {
    "users": [
      {"id": 1, "name": "Ganesh"}
    ]
  }
  

  Your XML should look something like (adjust based on API requirements):

  <request>
    <users>
      <user>
        <id>1</id>
        <name>Ganesh</name>
      </user>
    </users>
  </request>
  

• Check if your API is configured to handle XML parsing
  Many APIs are set up to handle JSON by default but don't have XML parsing enabled out of the box. For example:

  • If you're using Spring Boot, you'll need to add the jackson-dataformat-xml dependency to your project
  • For Node.js APIs, you might need to use a library like xml2js to parse incoming XML requests
    If your API doesn't have the right tools to process XML, it won't extract any data from the request body, leading to an empty array.

• Validate your XML syntax
  Even small syntax errors (like unclosed tags, missing quotes, or unescaped special characters such as &) can break parsing. Use an XML validator to check that your XML is well-formed before sending it.

• Inspect the raw request in Postman
  In Postman's "Body" tab, select "Raw" and choose "XML" from the dropdown menu. Paste your XML content and make sure there are no extra spaces, line breaks, or invisible characters that might be causing issues. Sometimes copied-and-pasted content can carry hidden formatting that disrupts parsing.

• Debug the API side (if you have access)
  If you can view the API's logs or code, check what's happening when an XML request comes in:

  • Print the raw request body to confirm it's being received correctly
  • Look for any parsing errors in the logs (e.g., "invalid XML" exceptions)
  • Verify that the parsed XML data is being mapped to the correct objects/arrays in your API code

内容的提问来源于stack exchange，提问作者ganesh y